Flight OddsUA3666 ORD → DCA
United Airlines · Chicago, IL to Washington, DC · 66 flights observed, 2026-02-12 to 2026-04-29 · 612 mi
UA3666 covers more than one route in the data window — the stats below are for ORD → DCA, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
80%
Median delay
-6 min
90th percentile
+43 min
Cancellation rate
0%
How often is UA3666 on time?
Across 66 flights on ORD → DCA from 2026-02-12 to 2026-04-29, UA3666 arrived within 15 minutes of schedule 80% of the time. The median arrival delay was -6 min, and the worst 10% of flights arrived +43 min or later. 0% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 53 | 80% |
| 16-30 min | 3 | 5% |
| 31-60 min | 4 | 6% |
| 61-120 min | 5 | 8% |
| 2+ hrs | 1 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-02 | 14 | 71% | +6 min |
| 2026-03 | 27 | 89% | +2 min |
| 2026-04 | 25 | 76% | +7 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 11 | 82% |
| Tue | 11 | 82% |
| Wed | 11 | 82% |
| Thu | 11 | 82% |
| Fri | 11 | 55% |
| Sat | No data | — |
| Sun | 11 | 100% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…